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134453-12-6

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134453-12-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 134453-12-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,4,4,5 and 3 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 134453-12:
(8*1)+(7*3)+(6*4)+(5*4)+(4*5)+(3*3)+(2*1)+(1*2)=106
106 % 10 = 6
So 134453-12-6 is a valid CAS Registry Number.

134453-12-6Relevant articles and documents

Synthesis of Tetrahydrolipstatin

Chadha, N. K.,Batcho, A. D.,Tang, P. C.,Courtney, L. F.,Cook, C. M.,et al.

, p. 4714 - 4718 (1991)

An asymmetric synthesis of tetrahydrolipstati (4) is described.Application of our previously described in situ cyclopentadiene alkylation-asymmetric hydroboration protocol provided the key chiral alcohol 9.In the course of this work, the presence of a free hydroxyl group was found to exert a strong directing effect on the regioselectivity of a Baeyer-Villiger reaction (16 --> 17).Subsequent transformations of lactone 17 produced tetrahydrolipstatin.

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